In reply to timmyhobby:
Hi Tim
Are you living in Italy for more than 90 days? If not, you could use the BMC website to arrange cover, just mark down that you are normally resident in the UK.
Otherwise, the Club Alpino Italiano have policies. You could email them - assicurazioni at cai.it
Do you speak Italian? If not, it may be difficult. Italian bureaucracy is an absolute pain in the ass!